I'm not a programmer, but according to MysticalOS in the Ara Broker Guild Friends thread
"green tiles i may be able to fix too, that's caused by a 5.x api change where calling an invalid texture path returns green blob instead of just no texture like it used to."
hope that helps

Works on every other character I have, but refuses to display anything for one of my rogues, no error messages at all. I removed all the saved data relating to Lightheaded, reinstalled it and still nothing. Anyone got any ideas?
Edit: Managed to narrow it down to FluidFrames, removing the saved data for it did the trick, presume...